1813924365243 has 16 divisors (see below), whose sum is σ = 2440213776000. Its totient is φ = 1198461079424.

The previous prime is 1813924365229. The next prime is 1813924365251. The reversal of 1813924365243 is 3425634293181.

It is a cyclic number.

It is not a de Polignac number, because 1813924365243 - 2¹⁸ = 1813924103099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1813924365223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3182008 + ... + 3708506.

It is an arithmetic number, because the mean of its divisors is an integer number (152513361000).

Almost surely, 2^{1813924365243} is an apocalyptic number.

1813924365243 is a deficient number, since it is larger than the sum of its proper divisors (626289410757).

1813924365243 is a wasteful number, since it uses less digits than its factorization.

1813924365243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536778.

The product of its digits is 3732480, while the sum is 51.

The spelling of 1813924365243 in words is "one trillion, eight hundred thirteen billion, nine hundred twenty-four million, three hundred sixty-five thousand, two hundred forty-three".